It was unclear from Apple’s documentation at press time whether the iOS 12.1.2 update includes any software changes to circumvent Qualcomm patents in China as rumored.

The eSIM feature requires iPhones with an electronic SIM card that permits the works alongside the regular SIM card so customers can use two phone numbers simultaneously. eSIM is also used on cellular iPads.

eSIM functionality requires the iOS 12.1 software update. The major US carriers like AT&T, Verizon and T-Mobile support eSIM. Apple’s support document lists countries and wireless carriers around the world that support the standard.

If you have been plagued with these issues, let us know if iOS 12.1.2 has managed to fix them by leaving your comment in the comments section down below.